Doesn't matter when or who invented the secret coding algorithms, there are thousands of coding algorithms out there for use and re-use. The CIA or MI5 would not know which one, or which combinations, the terrorists would be using. It would be like looking for a needle in a haystack for the CIA and MI5.

Terrorists have be known to use combinations of real and false codes to throw off secret services. This will keep the CIA and MI5 off balance and frustrated because the secret service will always need to waste resources to ensure all threats are mitigated.

Oh I'm sorry, I didn't realize you were an international espionage and counter terrorism expert. I bow before your almighty skills in

Maybe someday when you find the time (perhaps between covert missions to thwart terrorism)you could teach me all about algorithms,steganography and cryptography. I could only wish to be as informed as you...